STATISTICS REVIEW NAME ______1. The number of eagles observed along a certain river per day over a two week period is listed below. What is a frequency table that represents the data?
1 3 2 5 10 8 9 15 0 7 12 13 6 18
b .
2. The number of hours a group of contestants spent preparing for a quiz show are listed below. What is a frequency table that represents the data?
60 25 86 56 45 48 90 75 30 67 90 36 80 15 32 65 61
b .
3. The data below shows the average number of text messages a group of students send per day. What is a histogram that represents the data? STATISTICS REVIEW NAME ______20 5 8 22 10 1 7 15 16 12 15 6 13 8
b . 5 5 5 5 y y y y c c 4 4 c 4 c 4 n n n n e e e e u u u u q q q q e e e e
r 3
r 3 r 3 r 3 F F F F
2 2 2 2
1 1 1 1
0-4 5-9 10-14 15-19 20-25 0-4 5-9 10-14 15-19 20-25 0-4 5-9 10-14 15-19 20-25 0-4 5-9 10-14 15-19 20-25 Messages Messages Messages Messages
4. The data below shows the number of kilowatt 5. The data below shows the number of hours of electricity used by the tenants of a hours a week on average a group of small apartment building in a given month. students spend volunteering for What is a cumulative frequency table that community service projects. What is a represents the data? cumulative frequency table that represents the data?
80 85 86 90 96 75 66 70 99 65 70 99 70 73 64 92 72 81 88 91 93 69 77 82 4 5 10 21 6 2 9 8 12 15 8 14 6 4 6 11 3 2 9 16 22 23
+ STATISTICS REVIEW NAME ______
6. Find all measures of central tendency for the test 7. Suppose that to make the golf team you scores on a math exam: need to score no more than 81 on average over 5 games. If you scored 75, 74, 100, and 69 in your first 4 games what is the highest score you can shoot in your 88, 89, 65, 62, 83, 63, 84, 63, 74, 64, 71, 82, 66, 88, 5th game and still make the team? 79, 60, 86, 63, 93, 99, 60, 85
a. 88 c. 87 b. 85 d. 89 a. mean = 75.8 b. mean = 75.8 median = 79.5 median =76.5 mode = 63 mode = 63 c. mean = 69.5 d. mean = 69.5 median = 76.5 median = 76.5 mode = 63 mode = 79.5
8. The data below show the number of games won by a football team in each of the last 15 seasons. What is a histogram that represents the data?
3 4 8 12 7 2 1 15 16 6 10 13 4 1 5 STATISTICS REVIEW NAME ______b . 5 5 5 5
4 4 4 4 y y y y c c c c n n n n e e e e u u
3 u 3 3 u 3 q q q q e e e e r r r r F F F F 2 2 2 2
1 1 1 1
0-4 5-9 10-14 15-19 0-4 5-9 10-14 15-19 0-4 5-9 10-14 15-19 0-4 5-9 10-14 15-19 Wins Wins Wins Wins
9. The table shows the number of hours that a group of students spent studying for the SAT during their first week of preparation. The students each add 4 hours to their study times in the second week. What are the mean, median, mode, and range of times for the second week?
Student Hours Bob 19 James 10 Karen 15 Rosario 17 Antoine 10 Julio 16 Maria 13
mean = 14 mean = 19 median = 19 median = 18.3 mode = 18.3 mode = 14 range = 9 range = 0.7 mean = 18.3 mean = 18.3 median = 19 median = 19 mode = 14 mode = 14 range = 9 range = 0.7 1. Find the mean, median, range and mode of the NFL football scores from the weekend. Indianapolis Colts 9, Baltimore Ravens 24, Seattle Seahawks 24, Washington Redskins 14, Cincinnati Bengals 13, Houston Texans 19, Minnesota Vikings 10, Green Bay Packers 24.
MEAN: MEDIAN: MODE: RANGE:
2. In problem 1, which measure of central tendency would best describe the data? a. Mean b. Median c. Mode d. Range
3. Is it possible to have more than one mode in a data set? Explain your answer.
Questions 4-7 Janae is a store manager and needs help to determine which measures of central tendency she needs to use to compare her store’s sales with other stores.
4. Which measure of central tendency would Janae need to calculate her average monthly sales for 2011? a. Mean c. Mode b. Median d. Range
5. Which measure of central tendency would Janae find if she wanted to determine the difference between her highest monthly sale and his lowest? a. Mean c. Mode b. Median d. Range
6. If Janae’s sales do not have an outlier in the data she should base his calculations on the mean. a. True b. False
7. Which measure of central tendency would Janae find to determine how much money she makes per sale most frequently? a. Mean c. Mode b. Median d. Range 1. The following exam scores are from a class last semester. Create a frequency table using intervals of 10.
44 75 90 30 36 90 94 75 85 65 67 19 56 92 25
72 67 14 78 75 78
2. Use the frequency table you created from #1 to make a histogram.
3. Tell whether each graph is uniform, normal, or skewed.
a. b. c.
4. Given the frequency table construct a histogram for the data. Be sure to label your graph. State whether the graph is uniform, normal or skewed.
Studying for Finals Hours Frequency 0-3 9 4-7 6 8-11 3 12-15 2